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Minuet: Rethinking Concurrency Control in Storage Area Networks

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Minuet: Rethinking Concurrency Control in Storage Area Networks
Clustered applications in storage area networks (SANs), widely adopted in enterprise datacenters, have traditionally relied on distributed locking protocols to coordinate concurrent access to shared storage devices. We examine the semantics of traditional lock services for SAN environments and ask whether they are sufficient to guarantee data safety at the application level. We argue that a traditional lock service design that enforces strict mutual exclusion via a globally-consistent view of locking state is neither sufficient nor strictly necessary to ensure application-level correctness in the presence of asynchrony and failures. We also argue that in many cases, strongly-consistent locking imposes an additional and unnecessary constraint on application availability. Armed with these observations, we develop a set of novel concurrency control and recovery protocols for clustered SAN applications that achieve safety and liveness in the face of arbitrary asynchrony, crash failures, a...
Andrey Ermolinskiy, Daekyeong Moon, Byung-Gon Chun
Added 17 Feb 2011
Updated 17 Feb 2011
Type Journal
Year 2009
Where FAST
Authors Andrey Ermolinskiy, Daekyeong Moon, Byung-Gon Chun, Scott Shenker
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